On Decoherence in Quantum Clock Synchronization

Details On Decoherence in Quantum Clock Synchronization On Decoherence in Quantum Clock Synchronization

2006-05-01

arxiv.org/abs/quant-ph/0605013v1

Laser Physics, 16, 1525 (2006). Special Issue on Quantum Information and Quantum Computation.

Physics

Quantum Physics

12 Pages, 3 Figures

Scientific paper

10.1134/S1054660X06110065

We study two quantum versions of the Eddington clock-synchronization protocol in the presence of decoherence. The first protocol uses maximally entangled states to achieve the Heisenberg limit for clock synchronization. The second protocol achieves the limit without using entanglement. We show the equivalence of the two protocols under any single-qubit decoherence model that does not itself provide synchronization information.

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